High-resolution CT of the normal and abnormal fallopian canal.

A two-part anatomic and clinical high-resolution computed tomographic (HRCT) study of the fallopian canal was conducted. From the correlation of HRCT images of eight specimen temporal bones with their corresponding anatomic sectional images, it was evident that the full length of the fallopian canal can be accurately visualized. An axial section demonstrates the labyrinthine segment, geniculate ganglion fossa, and proximal part of the tympanic segment, whereas a Stenver projection is used for the tympanic segment, second knee, and mastoid segment. In clinical studies axial sections simultaneously visualized the proximal parts of the fallopian canal in 82% of 28 cases, whereas Stenver projections simultaneously visualized the distal parts in 75% of 16 cases of acute facial nerve palsy. Twenty-one patients with intratemporal facial nerve palsy and six patients with congenital atresia of the external auditory canal were also examined. HRCT was highly accurate in detecting and defining neoplastic, inflammatory, and congenital lesions of the fallopian canal. A lower rate of detection was recorded for traumatic lesions.